A low, gray, often dark cloud that precipitates rain, snow, or sleet.
The type of extensive gray cloud that obscures the sun, found at low altitudes and consisting of dense, dark layers of water droplets, rain, or snow.
A dark, gray, mid-altitude cloud that often covers the entire sky and precipitates rain, snow, or sleet. Nimbostratus clouds generally form around 2,000 m (6,560 ft) but often extend to much higher and lower altitudes.
Origin of nimbostratus